Forum Discussion
Thong_196816
Nimbostratus
Nimbostratusnetwork failover/serial cable for HA
for HA configurations, there are 3 options
network failover
in network failover the heartbeat is the network packet
serial failover
serial cable failover is just checking a vo...
network and Serial failover
If you configure a BIG-IP high-availability pair to use network failover, and the hardwired failover cable also connects the two units, hardwired failover always has precedence; if network failover traffic is compromised, the two units do not fail over because the hardwired failover cable still connects them.
sol2397: Comparison of hardwired failover and network failover features
https://support.f5.com/kb/en-us/solutions/public/2000/300/sol2397.html
nitass_89166
Noctilucent
Noctilucentnetwork and Serial failover
If you configure a BIG-IP high-availability pair to use network failover, and the hardwired failover cable also connects the two units, hardwired failover always has precedence; if network failover traffic is compromised, the two units do not fail over because the hardwired failover cable still connects them.
sol2397: Comparison of hardwired failover and network failover features
https://support.f5.com/kb/en-us/solutions/public/2000/300/sol2397.html
Thong_196816Hi Nitass, Quoted " If network failover traffic is compromised, the two units do not fail over because the hardwired failover cable still connects them " - can give an example of such scenario ? - do you mean the 2 units still show as active-standby status?- nitass_89166>can give an example of such scenario ? probably heartbeat packet is lost or delayed. >do you mean the 2 units still show as active-standby status? yes
- Thong_196816Hi Nitass, what is the outcome if both network and serial cable failed in this case?
- nitass_89166both units will go active (i.e. active-active).
- Thong_196816finally.. will use LAN cables to connect between active-standby devices (not more using network failover - connect to switch). I will assign IP for interface 1.7 on both units , hope this works.
InquisitiveMaiCirrostratus
Has anybody disconnected the Serial/Hardware cable when Network failover shows OK for atleast 1 network? Has it caused any failover event, even when network failover was looking good?